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Device for starting and inserting absorbers and / or moderators into the nuclear fission zone of a nuclear reactor and nuclear fuel assembly comprising such a device
Device for starting and inserting absorbers and / or moderators into the nuclear fission zone of a nuclear reactor and nuclear fuel assembly comprising such a device
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机译：用于将吸收剂和/或缓和剂启动和插入到核反应堆和核燃料组件的核裂变区中的装置，包括该装置
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摘要
A system that activates and inserts a neutron absorber and / or a mitigation material (2) into a nuclear fission region of a nuclear reactor that is installed in a nuclear fuel assembly in which coolant is circulated, the system comprising an absorber ( 2) Capsule (10) fitted with holding means (11) for fixing in a non-insertion position, stop surface (24) forming means for locking holding means (11), means for releasing absorbent material And a thrust surface (26) that is supported on the control head (18). The shell (19) is differentially expanded in the longitudinal direction relative to the capsule (10) under the influence of the coolant temperature rise, moving the surfaces (24, 26) and the furnace is at normal operating temperature. The stop surface is moved away from the holding means, and at the threshold temperature the thrust surface (26) releases the absorber. [Selection] Figure 2A
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